Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ukma!xanth!mcnc!pickel
From: pickel@mcnc.org (Lisa C. Pickel)
Newsgroups: comp.windows.x
Subject: do-it-yourself popups in Xlib
Keywords: how
Message-ID: <4748@alvin.mcnc.org>
Date: 21 Jun 89 15:24:11 GMT
Distribution: na
Organization: Microelectronics Center of NC; RTP, NC
Lines: 26

Okay, I give up.  I'm still at work porting old things to X11, and
my question is:  what is the proper way to open popup windows and then
get them to disappear again?  Obviously, I'm missing completely the
proper X "philosophy" on this issue.

In the following, I use the ancient term "popup" to refer to any child
window of the parent in my application.  The children lie totally within
the bounds of the parent and they are spawned by the parent window.

I want to draw objects inside my popups and then, when I kill the popup, 
have the whole mess disappear.  It does not.  I've tried:

1) Save-under.  We don't have it.  That's out.

2) Saving the underlying pixmap before mapping the popup (with 
   IncludeInferiors set).  However, I still get garbage in the pixmap 
   where other popups beneath the popup in question lie.  (Yes, 
   everybody has the same depth).
   
3) Drawing everything to the parent window and defining the popup as 
   InputOnly.  This seems kludgey and philosophically incorrect.  I mean, 
   you open a window, graphical operations are defined to occur in that 
   window, shouldn't you *draw* in that window?  Anyway, it too seems 
   not to work properly.

Lisa.